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Old 03-20-2013, 09:25 PM
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Cedar apple rust


(Gymnosporangium juniperi-virginianae) It struck again this year. Luckily, I do not live near an orchard, nor has it harmed the type of cedar it is growing on. First time I saw it, I was shocked... I thought it was some kind of.. unknown goo. Put it under a microscope and found that it had a two-cell setup. Called a local college and got it all sorted.

Sadly, control for this is not very efficient. Apple trees can be sprayed with a fungicide when pip-ing. The cedar, well.. a spray with the same fungicide during the June-August season can reduce the breakouts.

Nasty goo.
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Old 03-20-2013, 09:57 PM
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I did a quick Google search and found a link which will help others understand this problem. Anyone with a cedar tree and prune out the galls from their cedar trees to help stop the spread of this disease to the apple trees.

http://pods.dasnr.okstate.edu/docush...PP-7611web.pdf
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Old 03-21-2013, 03:51 AM
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This happens here too. About the only choice it either to cut down the cedar or dig it up and move it to truly stop it. The fungicide greatly helps but doesnt stop it
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Old 03-21-2013, 05:30 AM
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Wow! That is nasty! I have never seen anything like that before! I hope you can find a remedy soon.
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Old 03-22-2013, 10:47 AM
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It does cause big problems unless the infected cedar is close to the apple trees. Vie seen that stuff all my life, when it starts it kinda looks like where a pine has gotten the bark knocked off and resin oozes out and forms basically a scab. Kinda gooey till it hardens in the sun. It will kill the cedar eventually.
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Old 03-22-2013, 12:01 PM
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Yeah, luckily, the damage is low on the cedar we have. The cedar does need to come out though, it's very old and ruining our sewer lines. Bad planning on the people who built around the tree 60 years ago. haha.
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Old 03-22-2013, 12:53 PM
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Oh I hate that you have to cut it but you cant have it going into e septic tank.
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Old 03-22-2013, 12:55 PM
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Nope. It'd be bad. Like bad-bad. It's a good tree though, excellent shade. I'll be sad to see it go.
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